If you’re a dog owner, there’s a good chance you’ve heard of NexGard Spectra. It’s widely recommended by vets and loved by pet parents for its all-in-one protection against fleas, ticks, and worms. But let’s get real—you want to know how quickly it starts working once your pup chomps it down. After all, when your dog’s itching or at risk, every minute counts, right?

Let’s dive into how fast NexGard Spectra actually kicks in and what you can expect once your furry friend takes it.

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What is NexGard Spectra?

NexGard Spectra is a monthly beef-flavoured chew that combines two powerful ingredients—Afoxolaner and Milbemycin Oxime. This combo provides broad-spectrum protection against:

• Fleas

• Ticks

• Heartworms

• Intestinal worms (like roundworms, hookworms, and whipworms)

What makes it a favourite? It tackles multiple parasites with just one chewable tablet, and most dogs gobble it up like a treat. No messy liquids or struggle baths involved.

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How Does NexGard Spectra Work?

Once swallowed, NexGard Spectra’s ingredients are absorbed into your dog’s bloodstream. When parasites like fleas or ticks bite, they ingest the active ingredients and are knocked out quickly.

• Afoxolaner targets fleas and ticks by attacking their nervous systems.

• Milbemycin Oxime is a powerful dewormer that kills internal parasites and prevents heartworm larvae from maturing.

Think of it as an invisible shield that travels through your dog’s system, ready to strike any freeloaders trying to harm them.

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Time It Takes for NexGard Spectra to Start Working

So how soon can you expect results? The good news is—it doesn’t keep you waiting long. Different parasites have slightly different response times, so let’s break it down.

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Flea Treatment Timeline

Fleas are often the first pest to bug your pup, and NexGard Spectra deals with them fast.

• Starts killing fleas within 6 to 8 hours of administration.

• Interrupts the flea lifecycle by killing adult fleas before they lay eggs.

That means you’ll likely see your dog stop scratching by the same evening—or even sooner.

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Tick Treatment Timeline

Ticks can be dangerous, especially those carrying paralysis or Lyme disease. Fortunately, NexGard Spectra offers strong protection.

• Begins working against ticks within 24 to 48 hours.

• Effective against three common types:

  • Paralysis ticks

  • Brown Dog ticks

  • Bush ticks

It not only kills ticks that are already on your dog but also prevents new ones from attaching and feeding.

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Worm Control Timeline

Worms are sneaky internal threats, and NexGard Spectra handles them differently depending on the type.

• Intestinal worms (roundworms, hookworms, whipworms):

  • Eliminated within 24–48 hours of taking the chew.

• Heartworms:

  • The treatment is preventive, stopping larvae from growing into adult heartworms.

  • Begins protecting your dog within a few days after administration.

  • Consistency is critical—missing doses can expose your dog to infection.

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Summary Table of Action Times

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Factors That May Influence Speed of Action

While NexGard Spectra is fast-acting, a few factors can influence how quickly it kicks in:

• Dog’s size and health: Ensure the correct dose is used based on weight.

• Severity of infestation: Heavier infestations may take longer to clear up completely.

• Whether your dog swallowed the full dose: If they spit it out or don’t eat the whole chew, it may not work as expected.

• Timing: Monthly consistency keeps protection levels high.

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How You Know It’s Working

Wondering if it’s doing the job? Look for these signs:

• Reduced scratching

• Fewer fleas or ticks visible

• Shinier coat and better energy levels

• No more worms in your dog’s poop

You may also notice dead fleas or ticks in their bedding or fur—gross, but a good sign it’s working!

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What If You Miss a Dose?

Missed a month? Don’t panic. Give the chew as soon as you remember, then resume monthly from that date.

But don’t make it a habit—missing doses weakens the protection, especially when it comes to heartworm prevention.

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How to Administer NexGard Spectra Properly

The beauty of NexGard Spectra is in its ease.

• Give one chew once a month, preferably on the same date.

• It can be given with or without food.

• For fussy eaters, hide it in cheese or a favourite treat. Most dogs think it’s a snack anyway!

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NexGard Spectra vs Other Parasite Treatments

Unlike topical treatments or collars, NexGard Spectra:

• Won’t wash off during baths or swims

• Has no residue or odour

• Works internally and systemically

• Kills multiple parasites with one dose

It’s basically convenience in chewable form—and who doesn’t love that?

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Vet Recommendations and Clinical Backing

Vets all over Australia (and globally) recommend NexGard Spectra thanks to its:

• Scientific research backing

• Proven effectiveness

• Ease of use and compliance

It’s registered and approved after extensive trials, so you can trust it’s both safe and effective for your pup.

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Conclusion

So, how long does it take for NexGard Spectra to work? The short answer: really fast. Fleas start dying within 6–8 hours, ticks within a day or two, and worms are handled promptly. When used consistently, NexGard Spectra provides all-around protection that’s easy, effective, and stress-free.

If you’re looking for a reliable, vet-recommended treatment to protect your dog from inside and out, NexGard Spectra might just be your new go-to.

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FAQs

1. Can I give NexGard Spectra with food?
Yes! It can be given with or without food—whichever your dog prefers.

2. Is it safe for puppies?
It’s safe for puppies from 8 weeks of age and over 2 kg in weight.

3. Can I use it with other medications?
Generally yes, but always check with your vet before mixing treatments.

4. Will it kill flea eggs?
It kills adult fleas before they can lay eggs, effectively breaking the cycle.

5. What if my dog vomits after taking it?
If your dog vomits within two hours, it’s best to give another full dose.